Q: Patients on invasive ventilator have_________ alveolar water losses? (select one)
A) decreased
B) increased
Answer: A
Unfortunately, with electronic medical records and automated data insertion in everyday progress notes, insensible water losses are frequently overlooked. Patients' four major sources of water loss are urine, skin, respiratory tract, and stool.
Patients who are hyperventilating have higher alveolar water losses. Conversely, patients on ventilators inspire humidified air which is warmed to the body temperature. This decreases the alveolar water/insensible loss via the respiratory tract.
#water-balance
#pulmonary
References:
1. McNeil-Masuka J, Boyer TJ. Insensible Fluid Loss. [Updated 2022 Jul 25]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK544219/
2. Jacob M, Chappell D, Hofmann-Kiefer K, Conzen P, Peter K, Rehm M. Determinanten des insensiblen Flüssigkeitsverlustes. Perspiratio, Proteinshift und endotheliale Glykokalyx [Determinants of insensible fluid loss. Perspiration, protein shift and endothelial glycocalyx]. Anaesthesist. 2007 Aug;56(8):747-58, 760-4. German. doi: 10.1007/s00101-007-1235-4. PMID: 17684711.
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